Best guesses based on the W126 CD manual

1 - aux fan high speed relay
2 - aux fan low speed relay
3 - air pump clutch relay
4 - headlight wiper/washer relay
5 - power window relay
6 - not sure if power seat fuses or power window relay (I think the CD manual is mislabeled)

Sixto
95 S420
91 300SE
87 300SDL
83 300SD